Hi, 
I'm looking to understand the definition of each of the categories provided under the "Transaction value of Online shopping mall by commodity groups/operation type" and the retail sales "Sales by product group". I've looked at past Q&A questions but am having trouble accessing the korean website to look at the metadata as i'm constantly getting 404 errors (https://kosis.kr/statHtml.do?orgId=101&tblId=DT_1K41002&vw_cd=MT_ZTITLE&list_id=JG1&scrId=&seqNo=&lang_mode=ko&obj_var_id=&itm_id=&conn_path=MT_ZTITLE&path=%252FstatisticsList%252FstatisticsListIndex.do&orderBy=ASC). 

Is there any way that i can access the definitions for each of the categories (e.g., what exactly constitutes the computers and computer related appliances or fashion & accessories)? 

Secondly, can i also check the definition of what constitutes an online sale? Is it the same as the definition of gross merchandise value (i.e., total value of the goods sold online)? Or is it more in-line with the definition of net merchandise value (I.e., total value of goods sold online after factoring in returns, refunds, cancelled orders etc.)? 

Looking forward to hearing back soon